<!DOCTYPE html>
<html>

<head>
    <script type="text/javascript">
    </script>
</head>

<body>
    

    <script type="text/javascript">
        
        function reverse(n){
            // 创建一个DocumentFragment作为临时容器
            var f = document.createDocumentFragment();
            
        }
    </script>
</body>

</html>